A new miniaturized negative-index meta-atom for tri-band applications

Hossain, Mohammad Jakir; Faruque, Mohammad Rashed Iqbal; Abdullah, Sharifah Mastura Syed; Roslan, Muhamad Roszaini; Islam, Mohammad Tariqul

doi:10.1515/phys-2017-0052

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…If a metamaterial design has an ideal EMR value which is more than 4, then the results obtained for permittivity and/or permeability will be less than zero. 22 The SSM design structure has a highest EMR value of 15.605 at the first resonance frequency, which was subsequently reduced for the following resonance frequencies. Since, the SAR values for metamaterial satisfy the EM absorption limit, hence the proposed SSM design can apply for EM absorption reduction application.…”

Section: Resultsmentioning

confidence: 98%

Dielectric passive left-handed symmetric metamaterial design for electromagnetic absorption reduction application

Ramachandran

Faruque

Islam

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Electromagnetic exposure became an alarming issue in the 20th century, which has resulted in the creation of shielding metamaterial to reduce the radiation effects from any wireless devices. In this research work, a square-shaped metamaterial structure was designed and numerically simulated using a well-known computer simulation technology microwave studio software. The relationship between human head and cellular phone was explored for L- and S-bands, respectively. The proposed metamaterial design is utilized by placing inside a mobile phone to reduce the electromagnetic effect that is absorbed by the human head. The simulation frequency range is adopted from 1 to 6 GHz where the square-shaped metamaterial manifests resonance frequencies at 1.602 GHz (L-band), 2.712 and 3.888 GHz (S-band). Meanwhile, the specific absorption rate results reveal that the reduction happened approximately 1.591% at L-band, 36.646% and 17.864% at S-band over 1 g of tissue volume. Moreover, the second highest reduction value exhibited at 2.712 GHz for 10 g of tissue volume with 20.077% respectively. Briefly, the findings reveal a strong specific absorption rate reduction accomplishment and the proposed square-shaped metamaterial design believed to be a promising aspect in the telecommunication field.

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Section: Resultsmentioning

confidence: 98%

Dielectric passive left-handed symmetric metamaterial design for electromagnetic absorption reduction application

Ramachandran

Faruque

Islam

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…The magnetic and electrical properties were determined by analysing the effect of tunnelling, which was generated by using the SRR. Additionally, a miniature negative-index metamaterial was constructed, numerically simulated, fabricated, and finally, measured for tri-band applications [9]. The work analyzed the reflection, transmission coefficient, and effective medium ratio values of the proposed metamaterial.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Multi-Layer and Cuboid Coding Metamaterials for Radar Cross-Section Reduction

et al. 2022

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This research aimed to develop coding metamaterials to reduce the Radar Cross-Section (RCS) values in C- and Ku-band applications. Metamaterials on the macroscopic scale are commonly defined by effective medium parameters and are categorized as analogue. Therefore, coding metamaterials with various multi-layer and cuboid designs were proposed and investigated. A high-frequency electromagnetic simulator known as computer simulation technology was utilised throughout a simulation process. A one-bit coding metamaterial concept was adopted throughout this research that possesses ‘0’ and ‘1’ elements with 0 and π phase responses. Analytical simulation analyses were performed by utilising well-known Computer Simulation Technology (CST) software. Moreover, a validation was executed via a comparison of the phase-response properties of both elements with the analytical data from the High-Frequency Structure Simulator (HFSS) software. As a result, promising outcomes wherein several one-bit coding designs for multi-layer or coding metamaterials manifested unique results, which almost reached 0 dBm2 RCS reduction values. Meanwhile, coding metamaterial designs with larger lattices exhibited optimised results and can be utilised for larger-scale applications. Moreover, the coding metamaterials were validated by performing several framework and optimal characteristic analyses in C- and Ku-band applications. Due to the ability of coding metamaterials to manipulate electromagnetic waves to obtain different functionalities, it has a high potential to be applied to a wide range of applications. Overall, the very interesting coding metamaterials with many different sizes and shapes help to achieve a unique RCS-reduction performance.

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“…Abhishek et al designed dual band metamaterial unit-cell structure with dimension was 7.5 × 7.5 × 0.787 mm 3 and the EMR was 7.14 [15]. Hossian et al proposed a "double C-shape" metamaterial structure dimension of 12×12×1.6 mm 3 and the EMR was 9.62 [16]. Abbott et al designed a compact capacitive loading design to improve the effective medium ratio [17].…”

Section: Introductionmentioning

confidence: 99%

A new double ш-shaped compact negative refractive index metamaterial for wideband applications

Paul

Hossain

Karmaker

et al. 2020

IJEECS

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<p>This paper analyzed the new compact design and negative refractive index (NRI) metamaterial for wideband applications. The proposed metamaterial exhibits NRI and wideband characteristics of the x-axis wave propagation. It displayed the NRI property at the frequency of 1.54 GHz and wideband from 1.26 GHz to 7.08 GHz frequency (L, S, and C band). Moreover, the response of the 1×2 horizontal and 2×1 vertical array structure showed the wideband frequency in the 7.17 GHz to 13.62 GHz and 1.46 GHz to 9.53 GHz, respectively. Electromagnetic simulation software called CST has been used to design the metamaterial unit cell. The metamaterial has been displayed the multi-band characteristics such as L, S, C, X and K<sub>u</sub> bands with negative index material properties.</p>

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A new miniaturized negative-index meta-atom for tri-band applications

Cited by 4 publications

References 16 publications

Dielectric passive left-handed symmetric metamaterial design for electromagnetic absorption reduction application

Dielectric passive left-handed symmetric metamaterial design for electromagnetic absorption reduction application

Design and Analysis of Multi-Layer and Cuboid Coding Metamaterials for Radar Cross-Section Reduction

A new double ш-shaped compact negative refractive index metamaterial for wideband applications

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